3In small bowl, stir frosting, milk and peanut butter until well blended. Spread over base. Stir jam; drop by teaspoonfuls over frosting. Swirl jam for a marbled design with tip of knife. Refrigerate 20 minutes or until set. For bars, cut into 9 rows by 4 rows.

Expert Tips

To swirl jam into frosting, use a narrow knife, toothpick or small metal spatula.